fix(queue): resolve real track covers in queue panel

Queue rows passed albumArtUrl straight to ArtTile, but for tracks that
field is usually empty — the real cover is served per-track from
/tracks/{id}/cover. Apply the same resolution PersistentPlayer uses
(getCoverUrl ?? getTrackCoverUrl) for both the now-playing tile and the
up-next rows.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/hooks/useResolvedQueueEntry.ts

@@ -9,6 +9,7 @@ export interface ResolvedQueueEntry {
   albumTitle: string;
   durationMs: number;
   hasCover: boolean;
+  albumArtUrl?: string;
 }
 
 /**
@@ -33,5 +34,6 @@ export function useResolvedQueueEntry(
     albumTitle: data?.albumTitle ?? entry.albumTitle,
     durationMs: data?.durationMs ?? entry.durationMs,
     hasCover: data?.hasCover ?? false,
+    albumArtUrl: data?.albumArtUrl ?? entry.albumArtUrl,
   };
 }